Abstract: In order to accurately grasp the range of loose circles of roadway surrounding rock and reasonably optimize the parameters of roadway bolt support,the loose circle of roadway surrounding rock was tested by self-developed force-measuring bolt,and the change range of loose circle of roadway surrounding rock was obtained as follows:the average thickness of loose circles of roadways at the top,adjacent to the top,at the bulging and straight wall was 1 070 mm,985 mm,997 mm and 970 mm respectively;the average loose circle of roadway surrounding rock is 1 016 mm,which belongs to a medium loose circle of the surrounding rock.Based on the numerical simulation software Flac3D,the values of the loose circle obtained from the test are verified,and the results are close to each other,which verifies the accuracy of the test results.